To: All U. S. CertainTeed Ceiling Customers
Subject: Commercial and Retail Ceiling Tile

Effective with all shipments beginning October1, 2010, CertainTeed Ceilings will increase
the price on all ceiling tiles except fiberglass products.

The increase will be 5% except for the states of Alabama, Arkansas, Florida, South Georgia,
Louisiana, Mississippi, South Carolina, North Carolina and Tennessee where a 15% increase
will be applied.

See attachment for more details